mcaligares opened a new issue, #14593:
URL: https://github.com/apache/grails-core/issues/14593
### Task List
- [x] Steps to reproduce provided
- [x] Example that reproduces the problem uploaded to Github
- [x] Full description of the issue provided (see below)
### Steps to Reproduce
1. Create a domain class with a group field
2. Insert some data to test
3. Create a Unit Test to check the group by
### Expected Behaviour
The "group by" statement should return a group result
```groovy
new User(name: 'user1', team: 'team1').save(flush: true)
new User(name: 'user2', team: 'team2').save(flush: true)
new User(name: 'user3', team: 'team2').save(flush: true)
def result = User.createCriteria().list {
projections {
groupProperty 'team'
}
}
result.size() == 2
result == [team1, team2]
```
### Actual Behaviour
The "group by" statement return a wrong result
```groovy
new User(name: 'user1', team: 'team1').save(flush: true)
new User(name: 'user2', team: 'team2').save(flush: true)
new User(name: 'user3', team: 'team2').save(flush: true)
def result = User.createCriteria().list {
projections {
groupProperty 'team'
}
}
result.size() == 3 // must be 2
result == [team1, team2, team2]
```
### Environment Information
- **Operating System**: Ubuntu 14.04.1 x86_64
- **GORM Version:** 6.1.6.RELEASE
- **Grails Version (if using Grails):** 3.3.0
- **JDK Version:** 1.8.0_40
### Example Application
[Grails Application with Unit Test to
play](https://github.com/mcaligares/gorm-test)
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